US PATENT SUBCLASS 108 / 136
BIASED SURFACE

Current as of: June, 1999
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108 /   HD   HORIZONTALLY SUPPORTED PLANAR SURFACES

136BIASED SURFACE

DEFINITION

Classification: 108/136

(under the class definition) Device provided with means to urge the surface in a predetermined direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2, for means to urge the surface about its tilt axis.

37, for means to urge the surface to or from a housed position.

71+, for an extension endleaf elevating mechanism.

84+, for an extension intermediate leaf elevating mechanism.

SEE OR SEARCH CLASS 248, Supports,

560+, for resilient supports, and subclasses 637+ for machinery supports.

297, Chairs and Seats,

307+, for a resiliently supported chair or seat.